2" diameter hard chromed alignment bar, 39-1/2" long, with p/n 310 alignment sleeve (1) for 3.150" (80mm) O.D. and 3.349" O.D. (85mm) bearings (small Ford) and choice of center alignment rings (1 pr). Comes in wood shipping/storage crate. Installation - Service instructions can be found on Service Bulletin #0009.